Hi Tbae, if you are finding the earlier runs on C25K more challenging because of the walking, why not just go and try run 3 of week 5, as you have already done C25K twice and for that matter a HM, I am sure a 20-minute run should be OK,
Yesterday I ran another 5K in around my average time of 32/33 minutes.
For you, see how it goes if you try that 20-minute non-stop run at a comfortable easy pace.
I think keeping to just one slow pace can be very tiring. Adding a 10 - 20 seconds burst of speed at the end of the final running interval helps increase the sense of achievement.
Part of my eventual weekly plan is to always do 12x 3o second bursts, so 3 occassions x4 x 30 sec flat out bursts with a small recovery in between bursts.
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